The engineering task
A liquid or gas flow must be measured reliably and controlled over a wide range. Meter, valve and piping compete for the same available pressure difference.
Too little meter differential reduces accuracy; too much wastes energy and creates noise. The valve needs adequate authority and, for gases, must not undergo uncontrolled critical expansion.
Required design data
- Fluid state and flow range
- Available upstream and downstream pressure
- Accuracy and turndown requirements
- Piping class, noise and cavitation limits
Technical solution approach
Create the pressure budget
Allocate available pressure to piping, meter, valve and required margin.
Size the meter
Calculate orifice bore and differential pressure at minimum, normal and maximum flow.
Size the valve
Check Kv/Cv, opening, authority, cavitation, flashing or critical gas flow.
Verify the operating envelope
Check every upstream/downstream pressure combination for measurement and controllability.
Complete piping mechanics
Verify diameter, wall thickness, bends and branches for pressure and temperature.
Expected deliverables
Suitable SOL ALPHA modules
The modules form a technically plausible toolchain. Their final selection and sequence will be confirmed during the later calculation against the applicable code and project conditions.